Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quem é o piloto do chassi-motor porsche 956 gti?
 ###Tabelas: CREATE TABLE norwegian_clubs'_performance_in_europe (norwegian_clubs'_performance_in_europe_id AUTO_INCREMENT PRIMARY KEY, Team VARCHAR, Contest and round VARCHAR, Opponent VARCHAR, 1st leg score* VARCHAR, 2nd leg score** VARCHAR, Aggregate score VARCHAR) CREATE TABLE 2010_newcomers_race_'a'_practice_times_and_leaderboard (2010_newcomers_race_'a'_practice_times_and_leaderboard_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Rider VARCHAR, Sat 21 Aug VARCHAR, Mon 23 Aug VARCHAR, Tues 24 Aug VARCHAR, Wed 25 Aug VARCHAR, Thurs 26 Aug VARCHAR, Fri 27 Aug VARCHAR, Sat 28 Aug VARCHAR) CREATE TABLE earnings (earnings_id AUTO_INCREMENT PRIMARY KEY, Year INT, Regional GVA INT, Agriculture INT, Industry INT, Services INT) CREATE TABLE official_results (official_results_id AUTO_INCREMENT PRIMARY KEY, Class VARCHAR, Team VARCHAR, Driver VARCHAR, Chassis – Engine VARCHAR, Laps INT) CREATE TABLE services (services_id AUTO_INCREMENT PRIMARY KEY, Platform INT, Frequency (per hour) INT, Destination VARCHAR, Service Pattern VARCHAR, Operator VARCHAR, Line VARCHAR)  
SELECT Driver FROM official_results WHERE Chassis – Engine = porsche 956 gti